My boat takes 2 12 volt batts. Hooked in series both are junk. I got a new high cranking batt. For free from a friend and a new deep cycle batt. From another friend is it cool to put them together in series. ?????? Thank you in advance
I guess I didn't give enough info , I also have two 6 volt batts also so I have 4 batts total and two 4 way master switches to isolate as needed, my question is when the 12 volt bank is on both does it matter if one batt. Is regular and one is deep cycle. ??? I don't see how it could matter !